@article {115,
	title = {Studies on Annalepis from Middle Triassic along the Yangtze river and its bearing on the origin of Iso{\"e}tes},
	journal = {Acta Botanica Sinica},
	volume = {40},
	year = {1998},
	note = {Cited By (since 1996):6Export Date: 11 November 2013Source: Scopus},
	month = {1998///},
	pages = {768 - 774},
	abstract = {Specimens of Annalepis have been found from the Middle Triassic Series in the Yangtze River valley and described, including a new species. Annalepis is similar to the living plant, Iso{\"e}tes , in many aspects, such as the herb with a corm, more or less clustering sporophylls, presence of a ligule, monolete suture microspores of Aratrisporites -type and trilete megaspores, etc. The similarities of features between the two plants indicate their close affinities and that A . brevicystis might be the ancestry of Iso{\"e}tes . Since there is a ligule on the sporophyll of Pleuromeia, the Pleuromeiaceae represented by Pleuromeia could be allied to the Iso{\"e}taceae, and both families should belong to Iso{\"e}tales. Iso{\"e}tales represents a distinct evolutionary sequence and is inferred as being evolved probably from Palaeozoic Sigillaria . In Mesozoic age, two evolutionary lines are proposed: one as a line from Pleuromeia to Nathorstiana in relation to wood-monopolar rhizophore; the other as a line from Annalenis to Iso{\"e}tes related to herb-bipolar corm. Annalepis appeared almost simultaneously in the Yangtze River valley in early Middle Triassic, but the distribution of Annalepis was concentrated from east to west during middle-late Middle Triassic, in relation to the marine regression which occurred cyclically from east to west on the Yangtze Platform during that time.},
	keywords = {Annalepis, Evolution, Isoetes, Middle Triassic, Origin, Yangtze river valley},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0032414084\&partnerID=40\&md5=b6306b3189c6672809b1bab17e2dd168},
	author = {Meng, F.-S.}
}
@article {50,
	title = {Spore morphology of Iso{\"e}tes (iso{\"e}taceae) from China},
	journal = {Journal of Systematics and Evolution},
	volume = {46},
	year = {2008},
	note = {Export Date: 11 November 2013Source: Scopus},
	month = {2008///},
	pages = {479 - 489},
	abstract = {Micromorphological characters of mega- and microspores of five Iso{\"e}tes species from China were observed under scanning electron microscope (SEM). Megaspores of I. hypsophila have a levigate ornamentation, and are 358 μm in diameter (mean, n=30), microspores of this species have a gyrus ornamentation, and are 22 μm in length (mean, n=30); megaspores of I. yunguiensis have a cristate-reticulate ornamentation, with a size of 390 μm in diameter (mean, n=30), while microspores nearly smooth with some fine granulates, and with a size of 22 gm in length (mean, n=30); megaspores of I. taiwanensis are tuberculate and 312 μm in diameter (mean, n=30), echinate microspores are 24 μm in length (mean, n=30); cristate megaspores of I. sinensis are 409 μm in diameter (mean, n=30), and echinate microspores are 28 μm in length (mean, n=30); megaspores of I. orientalis have a cristate-reticulate ornamentation, with diameter of 420 μm (mean, n=30), microspores of this species have an echinate-tuberculate ornamentation with a size of 34 μm in length (mean, n=30). Based on the morphological characters of spores and chromosome numbers among taxa, it was found that mean spore size in each species of Iso{\"e}tes generally reflected the ploidy level. I. hypsophila, I. yunguiensis and I. taiwanensis, with smaller mean spore size, are diploidy with 2n=22; I. sinensis (2n=44) and I. orientalis (2n=66), with larger mean spore size, are polyploidy. The spore morphology of Iso{\"e}tes still plays an important role in identification and classification of Iso{\"e}tes from China.},
	keywords = {China, Evolution, Isoetes, Origin, Spore morphology},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-57349117891\&partnerID=40\&md5=f310ff0165e440259efb4b7c64314743},
	author = {Liu, X. and Liu, H. and Wang, Q.-F.}
}
